BuildBuy Materials schedule Materials Schedule · USD 69
Two items had to be ordered before the builders started
Every material category for the extension, with the date each one has to be ordered to arrive when the trade needs it.
Your builder starts on 9 November. Working backwards from the trade sequence, two items have lead times longer than the gap between now and the day they are needed, and one of them holds up the roof. Everything else is comfortable if it is ordered in the right week.
Aluminium bifold doors quote an 11 week lead time and are needed in week 6. Rooflights quote 7 weeks and are needed in week 5. Both need ordering this week, and the door choice has to be final before you can.
Timing
When each category has to be ordered
Bars run from the order date to the date the material is needed on site. A bar that starts before today is an item you are already late on.
Ten of twelve categories are comfortable. The two at the top are the whole urgency of this document, and both are the kind of item people choose last because they are the visible, enjoyable decisions.
Schedule
Materials by trade
| Trade | Category | Quantity | Estimate | Who supplies |
|---|---|---|---|---|
| Groundwork | Concrete, hardcore, DPM | 18 m3, 12 t | USD 2,840 | Builder |
| Structure | Blocks, cement, sand | 1,420 blocks | USD 3,910 | Builder |
| Structure | Steel beam, 203x133 | 1 at 4.2 m | USD 1,180 | Order separately |
| Roofing | Timbers, membrane, tiles | 42 m2 | USD 5,620 | Builder |
| Glazing | Bifold doors, 4 panel | 1 at 3.6 m | USD 7,400 | You |
| Glazing | Rooflights | 2 at 1.0 x 1.5 m | USD 3,100 | You |
| Insulation | Floor, wall, roof | Full build | USD 3,280 | Builder |
| First fix | Electrical, plumbing materials | Full build | USD 2,940 | Trades |
| Heating | Underfloor heating kit | 26 m2 | USD 2,650 | You |
| Second fix | Plasterboard, skim | 86 m2 | USD 1,890 | Builder |
| Finishes | Floor tiles, adhesive | 26 m2 plus 10 percent | USD 3,120 | You |
| Finishes | Sanitaryware, brassware | Cloakroom | USD 1,840 | You |
| Finishes | Paint, sundries | Full build | USD 1,430 | Builder |
| Total | USD 41,200 |
Five categories are yours to supply, totalling about USD 18,100. Your builder's quote is labour plus the materials marked as theirs, which is why comparing it against a quote that included everything would have made it look expensive.
Quantities
Where the numbers came from, and the wastage
| Item | Measured | Order | Why the difference |
|---|---|---|---|
| Floor tiles | 26 m2 | 29 m2 | 10 percent for cuts and breakage. Standard, and higher for a diagonal lay |
| Blocks | 1,290 | 1,420 | 10 percent. Blocks break |
| Insulation board | 84 m2 | 92 m2 | Board sizes do not divide neatly into your spans |
| Plasterboard | 78 m2 | 86 m2 | 10 percent |
| Roof tiles | 38 m2 | 42 m2 | Plus a spare pack. Batches vary in colour |
| Paint | Calculated | Plus one tin | Touch-up after snagging, same batch |
The spare pack of roof tiles is worth the money. Tiles are made in batches and a replacement in two years will not match. Keep them somewhere dry and remember where.
Action
This week
- Today
Finalise the bifold specification
Size, colour inside and out, configuration, threshold type, glazing. Five decisions. Nothing else in the build can be ordered late; this one can stop it.
- This week
Order bifolds and rooflights
Both against confirmed opening sizes from your builder, not from the drawing. Openings on site differ from drawings more often than not.
- This week
Confirm the steel with the engineer
Your builder has assumed a 203x133. Get that confirmed in writing by whoever did the calculations before ordering.
- Week 1
Agree who orders what, in writing
Five categories are yours. Confirm with the builder so nothing is ordered twice and nothing is assumed by both sides.
- Ongoing
Order at the week shown, not earlier
Materials delivered early on a small site get damaged, stolen or in the way. The dates in section 01 are as early as is useful, not as early as possible.
- Bifold specification final and ordered
- Rooflights ordered against measured openings
- Steel size confirmed by the engineer
- Supply responsibilities agreed in writing
- Tile pattern decided before ordering
- Somewhere dry identified for early deliveries